I have a wireless IP camera network, that uses a Cisco System Power Injector, and a Cisco 2940 switch on a VLAN. Presently none of my cameras are showing any video in my management software. However if I go directly to each camera, and plug into them with a monitor they are displaying video, except the camera that has the Cisco System Power Injector at its location. Can someone tell me how to test the Cisco System Power Injector to see if it is blocking the video at that access point? Or perhaps give a few clear instructions on how to reset the device so that this issue is corrected?